package day240606.thead_demo;

public class SingletonTest {
    public static void main(String[] args) {
        for (int i = 0; i < 20; i++) {
         new Thread(new Runnable() {
             @Override
             public void run() {
                 System.out.println(Student1.getInstance());
             }
         }).start();
        }
    }
}
